lora-project/server-api/app.js

const koa = require('koa');
const path = require('path');
const fs = require('fs');

// Load config
const config = require('./config.json');
// custom modules
const mysql = require('./libs/mysql_pool');

// init mysql connection pool
mysql.database = config.db.mysql.dbname;
mysql.host = config.db.mysql.host;
mysql.user = config.db.mysql.user;
mysql.password = config.db.mysql.pass;
mysql.port = config.db.mysql.port;
mysql.createPool();

// Koa Middleware
const session = require('koa-session');
const Router = require('koa-router');
const koaBody = require('koa-body');
const koaStatic = require('koa-static');
const cors = require('kcors');

// Koa Main Application
const app = new koa();

const server = app.listen(3000, () => {
    console.log(`Server start on port ${server.address().port}`);
});

// Root Router
const router = new Router();

// enable body parser
app.use(koaBody({
    multipart: true,
    // upload file size 10mb
    maxFieldSize: 10 * 1024 * 1024
}));
// enable cors
app.use(cors());
// enable static file 
app.use(koaStatic(path.resolve(__dirname, 'public')));
// enable session
app.use(session({
    key: 'koa:sess',
    maxAge: 86400000,
    overwrite: true,
    httpOnly: true,
    signed: true
}, app));
app.use(router.routes());
app.use(router.allowedMethods());

// load other route
const api_route = require('./route/api');

// set other route
router.use("/api", api_route.routes());

router.get('/', async(c, n) => {
    c.body = 'Get root';
});